Picker for looms



June 10, 1941. BRAHs 2,245,140

PICKER- FOR LOOMS Filed May 20, 1'940 INVENTOR, George zffa'h,

ATTORNEY.

Patented June 10, 1941 L'ji 2,245,140 ricxns For. LGOMIS George Brahs,liawthorne, N. .F.

Application May 26, 1940, Serial No. 336,075

Claims. (Cl. 139-160) This invention relates to that class of pickersfor looms in which the picker is formed with a bore to receive aguide-rod on which the picker is reciprocated. Pickers are usually madeof rawhide or some other light but equally hard or indurated and pliablematerial; in the case of pickers of the type mentioned they are usuallyformed of layers, say of rawhide, bent around a mandrel so as to formsaid bore, the extremities of the layers, or at least some of them,being secured face to face, as by rivets, all more or less generally asshown in my Patent No. 1,989,910.

Due to direct contact between the guide-rod and the pliable material ofthe picker there is frictional heating and consequent drying out of suchmaterial, in itself a considerable factor in promoting the wear whichacts to enlarge and change the shape of the bore from true cylindricalto elliptical form, particularly at its ends, and also in weakening thematerial so that it responds to such change in shape, wherefore thepicker becomes undesirably loose on the guiderod.

One object of this invention is so to construct the picker that thecontact with the rod shall be borne by media better adapted to resistthe wear than the pliable material of the picker. Such media in theexample herein shown consist of bearing elements fixed in the body ofthe picker and exposed at the bore thereof.

It is usual not only to rivet the layers but also to cement themtogether, as with glue. Another object of the invention is to improveand prolong the life of the bond thus existing between the layers.

In the drawing,

Fig. 1 is an end elevation of the improved picker;

Fig. 2 shows the lining member partly in side elevation and partly inlongitudinal section;

Fig 3 is an end elevation of said member;

Fig. 4 is a fragmentary end elevation of the picker in the form in whicha bearing member is positioned at what I term the crotch in the picker;

Figs. 5 and 6 show the latter bearing member in side and end elevation,respectively;

Fig. 7 is a side elevation of a layer of the picker;

Fig. 8 is a section of two united layers, on a line such as 88, Fig, 6;and

Fig. 9 shows the picker and its guide-rod in side elevation.

The layer I forms what I have termed the lining layer, having been bentaround a suitable mandrel of the same diameter as the guide-rod (as,Fig. 9) for the picker and thus forming the bore ac. How its margins aredeveloped is not material, although as shown in Figs. 1, 3 and 4 theyextend in the same direction and substantially parallel with each other.Extending bent around and in laminated relation thereto is a layer hereexisting as two separate plies 2 and 3; the extermities of this layerextend from its thus bent portion in parallel and spaced relation toeach other, there being in this example an intervening layer 4 whichextends to the bore 11: and incidentally between saidmargins of thelining layer.

Remote from the portion a of the picker having the bore a and termed itshead is the portion 1; which is to engage the shuttle and is thick enedup by other layers as shown, the intervening or narrow portion 0 beingwhat is termed the shank of the picker. Rivets 5 penetrating theportions b and c bind the component layers together as usual.

In carrying out my invention the lining member has at suitably spacedintervals lengthwise thereof and around its bore metal studs 6 of amaterial, as metal, harder than the lining layer but preferably being ofa softer material, as brass, than the guide-rod so as not to score orappreciably wear the latter. These may be rivets, as shown. Preferablythey project into the bore, but in any event they assume a material partof the wear which the lining member would otherwise itself directlyundergo by wiping contact with the guide-rod; and if they project theypermit ventilation in the bore so that the heat otherwise incident tofriction and likely to dry and thus cause disintegration of the liningmember is dissipated.

The picker bore (by which of course I mean the passage through thepicker which provides. the surface next adjoining the guide-rod)undergoes considerable enlargement at its ends,

to wit (referring, for example, to Fig. 9) at the points indicated at zand a, the former of which is at the picker-stick side of the picker andthe side of the bore relatively adjacent the shank c and the latter ofwhich is at the shuttle side of the picker and the side of the borerelatively remote from the shank, such being due to the angulardisplacement to which the picker is subjected by the shuttle when it isimpelled back against the picker. Of course, the tendency for suchenlargement to take place at the point a may be opposed by one or morebearing members such as 6. To oppose it at the point z and/or thecorresponding point at the other end of the bore I provide as follows:

A plate 1, say of brass, is split from one edge and the metal both sidesof the split is bent in opposite directions out of the plane of theplate. Thus is formed a bearing member generally T-shaped in endelevation. The unsplit portion or shank of the plate is to occupy thementioned crotch d and its two oppositely bent portions Ia forming itshead are to occupy the bore of the picker; the first named portion maybe secured, as by a rivet 8, to any layer, as the layer 4 at its uppermargin. There may be two such bearing members, one at each end of thebore.

When the various layers are assembled, as shown, they are usually gluedeach face to face with its neighbor. In time the glue deteriorates andthe breaking of the bond between the layers is a factor which causes thepicker soon to become useless. To insure a stronger and more enduringbond I have formed that surface of each layer which is to adjoin anotherlayer with indentations 9 dispersed throughout substantially its wholearea. This may be eiiected by compressing the layer, as in a hydraulicpress, and a wire mesh of suitably heavy wire placed face to face withsaid layer. When any two layers, as in Fig. 8, which shows say the pliesor layers 23, are subjected to pressure with glue l9 between them, theglue fills the indentations, thus both increasing the strength and thedurability of the bond.

While bearing members such as one of those designated 6 and located atpoint z and one designated 1 and located at point z are preferablypresent I do not wish to be limited thereto since the presence of abearing member at either of these points, as adjacent at least one endof the bore and cut by a plane which cuts the bore diametrically andalso cuts what I term the extension of the picker, is within theinvention; such extension is here formed by the shank c and head b.

Having thus fully described my invention, what I claim is:

1. In combination, with a loom picker formed with a bore for the pickerguide-rod, a bearing member fixed in the picker and having a generallyTshaped form as viewed lengthwise of the picker bore and having its headlocated in the bore and arranged to wipe against the guiderod and itsshank projecting away from the bore.

2. In combination, with a loom picker formed with a bore for the pickerguide-rod, bearing members contained in the picker and each having agenerally T-shaped form as viewed length- Wise of the picker bore andhaving their heads located in the bore near the respective ends of thelatter and arranged to wipe against the guiderod and their shanksprojecting away from the bore.

3. In combination, with a loom picker formed of pliable sheet materialrebent and thus providing a bore at the bend therein adapted to receivethe picker guide-rod and its extremities projecting in generally thesame direction and forming between them a crotch extending from thebore, a bearing member consisting of a plate occupying the crotch andhaving a marginal portion extending into the bore and split and theparts thereof both sides of the split bent in opposite directions towardthe surface of the bore.

4. In combination, with a loom picker formed with a bore for the pickerguide-bore, numerous bearing elements for the guide-rod fixed in thepicker and dispersed in spaced relation to each other around andlengthwise of and projecting into the bore.

5. In combination, with a loom picker having a bore for the pickerguide-rod and having an extension projecting substantially laterallyfrom said bore and adapted to receive at one side thereof facinglengthwise of the bore the pickerstick impact and at the other side toimpinge against the shuttle, a bearing stud fixed in the picker near oneend of the bore and in a plane cutting the extension and at that side ofsaid end of the bore which approaches the guide-rod when the picker isangularly displaced by impact with the shuttle.

GEORGE BRAHS.

